Paint Rect visible on Drag to crop image coordinate

[patrik08]

Maybe it will be easier if you use QRubberBand?

Crasch app maybe QRubberBand and paintEvent is not able to live together....
&& i wand to display text pixel size to crop.... on top of rectange

i test now to split action & switch paint mode...

&& QWidget:aintEngine ()

typedef enum
{
DRAW_SELECTION,
MOVE_SELECTION,
MOVE_TOP_LEFT_CORNER,
MOVE_TOP_RIGHT_CORNER,
MOVE_BOTTOM_LEFT_CORNER,
MOVE_BOTTOM_RIGHT_CORNER,
MOVE_LEFT_SIDE,
MOVE_RIGHT_SIDE,
MOVE_TOP_SIDE,
MOVE_BOTTOM_SIDE,
SCALE_SELECTION,
DRAW_LINE,
KEYBOARD_CTRL,
NO_EFFECT
} DRAG_MODE;

[patrik08]

I have it .... the solution is only repaint on mouseMoveEvent && define each DRAG_MODE
on widged....

typedef enum
{  
  DRAW_SELECTION,
  SCALE_SELECTION,
  DRAW_LINE,
  DRAW_START,
  NO_EFFECT
} DRAG_MODE;
 
 
 
void Image_Operator::mouseMoveEvent(QMouseEvent *e)
{        
     currentDragMode = DRAW_LINE;
     mouseRELEASEPoint = e->pos();
     if (display.isNull()) {
     return;
     }
 
    /* remove draw lines */
    Load_Actual_Desktop();  /* widget size setting e resolution X11 */
    int hi_now = widgetSize.height();
    int wi_now = widgetSize.width();
 
      QPoint topLeft( 0 , 0 );
      QPoint bottomRight( widgetSize.width() , widgetSize.height() );  
      QRect areanow( topLeft, bottomRight );
    repaint(areanow);
}
 
 if ( currentDragMode == DRAW_SELECTION || currentDragMode == DRAW_LINE ) {
    OneWorkImage = selectionIMAGE;
    pen.setWidth( bordershade );
    pen.setColor( shapepicture );
    painter.setPen( pen); 
    painter.drawRect(selectionOutIMAGE);  
  /*   ...................  draw rectangle  or only image display on the Zoom Widged && resizable ....*/

typedef enum
{  
  DRAW_SELECTION,
  SCALE_SELECTION,
  DRAW_LINE,
  DRAW_START,
  NO_EFFECT
} DRAG_MODE;



void Image_Operator::mouseMoveEvent(QMouseEvent *e)
{        
     currentDragMode = DRAW_LINE;
     mouseRELEASEPoint = e->pos();
     if (display.isNull()) {
     return;
     }
    
    /* remove draw lines */
    Load_Actual_Desktop();  /* widget size setting e resolution X11 */
    int hi_now = widgetSize.height();
    int wi_now = widgetSize.width();
     
      QPoint topLeft( 0 , 0 );
      QPoint bottomRight( widgetSize.width() , widgetSize.height() );  
      QRect areanow( topLeft, bottomRight );
    repaint(areanow);
}

 if ( currentDragMode == DRAW_SELECTION || currentDragMode == DRAW_LINE ) {
    OneWorkImage = selectionIMAGE;
    pen.setWidth( bordershade );
    pen.setColor( shapepicture );
    painter.setPen( pen); 
    painter.drawRect(selectionOutIMAGE);  
  /*   ...................  draw rectangle  or only image display on the Zoom Widged && resizable ....*/

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source & PrtScn avaiable....

http://www.qtforum.de/forum/viewtopic.php?t=3885

[wysota]

Please try to express yourself with simple and full sentences, without "...", abreviations, images or code that distract the reader from the topic of your post - especially if you're not sure of your English language skills. Using such constructions makes your post barely readable and hardly understandable. So does including a large amount of code that doesn't add anything to the conversation. If you have to paste some of your code, please remove parts that are not important.

I have to say that after reading this thread a few times I still don't know what the problem was. The thread title suggests problems with cropping an image, but the thread content implies something completely different.